Not able to cross compile gRPC for QNX platform using aarch64-unknown-nto-qnx7.0.0-g++-5.4.0 compiler

Question

I am trying to cross compile gRPC code with QNX aarch64-unknown-nto-qnx7.0.0-g++-5.4.0 compiler. I am using a toolchain.cmake file to compile.

toolchain.cmake:

SET(CMAKE_SYSTEM_NAME QNX)
SET(CMAKE_SYSTEM_PROCESSOR arm)
set(CMAKE_CROSSCOMPILING 1)
set(CMAKE_SYSROOT "$ENV{TOOLCHAIN_PATH}")
set(CMAKE_C_COMPILER "$ENV{TOOLCHAIN_PATH}/usr/bin/aarch64-unknown-nto-qnx7.0.0-gcc-5.4.0")
set(CMAKE_CXX_COMPILER "$ENV{TOOLCHAIN_PATH}/usr/bin/aarch64-unknown-nto-qnx7.0.0-g++-5.4.0")
set(CMAKE_CXX_FLAGS "-Vgcc_ntoaarch64 -O2 -Wc,-Wall -DBUILDENV_qss -g -Os -Wall -march=armv8-a -mcpu=cortex-a57 -mtune=cortex-a57 \
        -fstack-protector-strong -DNDEBUG -DFMT_HEADER_ONLY -EL -DVARIANT_le -std=c++11 -stdlib=libstdc++ -lang-c++ \
        -I . \
        -I$ENV{TOOLCHAIN_PATH}/usr/include \
        -I$ENV{TOOLCHAIN_PATH}/usr/include/WF \
        -I$ENV{TOOLCHAIN_PATH}/usr/include/KHR \
        -I$ENV{INSTALL_ROOT_nto}/usr/include \
        -Wl,-L$ENV{INSTALL_ROOT_nto}/aarch64le/lib \
        -Wl,-L$ENV{INSTALL_ROOT_nto}/aarch64le/usr/lib \
        -Wl,-L$ENV{TOOLCHAIN_PATH}/aarch64le/lib \
        -Wl,-L$ENV{TOOLCHAIN_PATH}/aarch64le/usr/lib")

I am getting following error, even though I have used -std=c++11 (gnu++11 also tried):

error: #error "C++ versions less than C++11 are not supported."
error: 'constexpr' does not name a type
error: '__to_gcc_order' is not a member of 'std::__1::__gcc_atomic'
error: 'NormalizeLogSeverity' is not a member of 'absl'

Please help me to solve this issues.

Answer 1

There was some licencing issue, with which I was unable to build the code.

After updating the license this issue got resolved.